microwaves wireless communication
- Created by: chelsea todd
- Created on: 16-01-16 12:29
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- wireless communication- microwaves
- microwaves are used for satellite communications
- communications to and from satellites using microwaves
- but you need wavelengths which can pass easily through the earth watery atmosphere without too much absorption.
- for satellite TV and phones, the signal from a transmitter is transmitted into space...
- ... where its picked up by the satellites receiver dish orbiting the earth... the satellite transmits the signal back to earth in a different direction....
- ... where its received by a satellite dish on the ground
- ... where its picked up by the satellites receiver dish orbiting the earth... the satellite transmits the signal back to earth in a different direction....
- ... where its picked up by the satellites receiver dish orbiting the earth... the satellite transmits the signal back to earth in a different direction....
- ... where its received by a satellite dish on the ground
- microwaves are also used by remote sensing satellites...
- communications to and from satellites using microwaves
- microwaves are also used for mobile phones...
- mobile phone calls travel as microwaves, from your phone to local transmitter
- microwaves have a shorter wavelength than radio waves so they dont diffract much...
- this means that they are affected by the curvage of the earth..
- this means that they are affected by the curvage of the earth..
- as a result microwave transmitters need to be positioned in line of sight.... they are usually positioned high up on hilltops... and positioned fairly close together
- in adverse weather, there can be signal loss through absorption of water in the atmosphere
- sometimes there is interference between signals, which can also affect signal strength
- mobile masts may be dangerous...
- if microwaves are absorbed by water molecules in living tissue, cells may be burned or killed
- some think that the microwaves emitted into your body from using mobile phones could damage health
- any potential dangers can be increased by prolonged exposures to microwave radiations
- microwaves are used for satellite communications
- microwaves are also used for mobile phones...
- mobile phone calls travel as microwaves, from your phone to local transmitter
- microwaves have a shorter wavelength than radio waves so they dont diffract much...
- as a result microwave transmitters need to be positioned in line of sight.... they are usually positioned high up on hilltops... and positioned fairly close together
- in adverse weather, there can be signal loss through absorption of water in the atmosphere
- sometimes there is interference between signals, which can also affect signal strength
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